Michael Bernard Rubinstein (6 November 1920 – 12 January 2001) was a solicitor who specialised in representing authors and publisher.
His father Harold Rubinstein (1891–1975) was a solicitor with expertise in publishing matters; he acted on the unsuccessful defence of Radclyffe Hall's novel, The Well of Loneliness on obscenity charges in 1928.
His mother, Lina Naomi Rubinstein, née Lowy (died 1939) was the sister of Ruth, wife of publisher Victor Gollancz.
He specialised in representing publishers and authors, including Chatto & Windus, Sidgwick & Jackson, Hodder & Stoughton, Jonathan Cape, Victor Gollancz, and Penguin Books.
Rubinstein acted for publishers in libel cases, including defending Leon Uris and William Kimber against a libel claim brought by Dr Wladislaw Dering in 1964 for passages in Uris's novel Exodus describing medical experiments conducted by Dering on prisoners at Auschwitz.